Sunderland has reportedly made a formal bid for Swansea striker Danny Graham.

Graham is said to be unsettled at the Welsh club and believed to be keen on a move back to the north-east.

The Gateshead-born 27-year-old began his career at Middlesbrough, before productive spells at Carlisle and Watford gave way to a £3.5 million move to Swansea following their promotion to the Premier League in 2011.

Graham struck 12 goals in 36 league appearances as the Swans impressed under Brendan Rodgers last season, but he has seen his playing time restricted this term, with new manager Michael Laudrup favouring impressive Spaniard Michu.

Nevertheless, Graham has delivered when called on, with four goals in his last five appearances reminding potential suitors of his quality.

Reading Norwich and QPR have all been linked with the player in recent weeks, and amid the high levels of interest Sunderland manager Martin O'Neill has now tabled an offer.